﻿#region License

// PentaBiz - Sustainable Software Development Framework Copyright (C) 2013 Zoltán Csizmazia
// 
// This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.
// 
// This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 

#endregion

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Windows;
using System.Windows.Threading;
using PentaBiz.Studio.Services.Plugins.Models;

namespace PentaBiz.Studio.Services.Plugins
{
    //plugin services
    public partial class PluginManager
    {
        private readonly ObservableCollection<PluginServiceModel> _pluginServiceModels =
            new ObservableCollection<PluginServiceModel>();

        private readonly List<PluginTypeSelector> _pluginServiceTypes = new List<PluginTypeSelector>();

        public ObservableCollection<PluginServiceModel> PluginServiceModels
        {
            get { return _pluginServiceModels; }
        }


        public List<PluginTypeSelector> PluginServiceTypes
        {
            get { return _pluginServiceTypes; }
        }


        public void LoadPluginService(PluginTypeSelector pluginTypeSelector)
        {
            Dispatcher.BeginInvoke(() =>
                {
                    try
                    {
                        var pluginPackage = pluginPackages[pluginTypeSelector.PluginAssemblyName];
                        PluginHostProxy pluginHost = _pluginHostProxies[pluginPackage];

                        PluginServiceModel pluginServiceModel =
                            pluginHost.LoadPluginService(this, pluginTypeSelector);
                        PluginServiceModels.Add(pluginServiceModel);

                        //on host terminate remove the service from the screen
                        pluginHost.PluginHostExit += (o, e) =>
                                                     Dispatcher.BeginInvoke(() => PluginServiceModels.Remove(
                                                         pluginServiceModel));
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(ex.ToString(), "Error", MessageBoxButton.OK,
                                        MessageBoxImage.Error);
                    }
                }, DispatcherPriority.ApplicationIdle);
        }

        public void UnloadPluginServiceModel(PluginServiceModel pluginServiceModel)
        {
            PluginServiceModels.Remove(pluginServiceModel);
        }

        partial void InitializePluginServices()
        {
            //register plugin control types
            foreach (var pluginHostProxy in _pluginHostProxies)
            {
                _pluginServiceTypes.AddRange(pluginHostProxy.Value.GetPluginServiceTypeSelectors());
            }


            foreach (PluginTypeSelector pluginServiceView in PluginServiceTypes)
            {
                LoadPluginService(pluginServiceView);
            }

            PluginServiceModels.CollectionChanged += OnPluginCollectionChanged;
        }
    }
}